Getting SE traffic with phone number lookup sites

So, have any of you tried getting traffic with phone number lookup sites? Basically, when someone gets a phone call they dont recognize, a lot of times they will go to google, type it in, and try to find out who is calling. Sites have sprung up that allow people to enter information about that number and who called them, so others will know. I dont know enough about google to know if there is anyway to find out how many people search for 1-800-(wildcard) but I am sure there is a lot of traffic out there for you guys who know how to beat the competition in the rankings.

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